Flakbatterie Kilwa, Anti-aircraft battery in Butjadingen, Germany.

Flakbatterie Kilwa is a naval anti-aircraft battery in Tossens, consisting of four above-ground gun bunkers each holding a 10.5 cm gun, grouped around a central command bunker. A second command bunker, a munitions bunker and a machine bunker stood outside the main group. The first gun bunker and the command post are offset by about 35 degrees from the other bunkers.

The battery was built in spring 1936 on the farmland of farmer Theodor Friedrich Hansig; because the land belonged to an entailed farm, the Anerbengericht Nordenham had to approve the forced sale before the Reichskriegsministerium expropriated it for reasons of national defence. The field position with four 8.8 cm guns, on the site of today's holiday apartments, was ready for action on 13 September 1939, and a bunker battery was finished 250 metres further west behind the Tossenser Seedeich by the end of that month. It belonged to Marineflakabteilung 272, run from 1939 to 1945 by Flak-Ugruko Ost in Tossens. A Luftangriff on 19 February 1943 damaged accommodation and service buildings; after the war occupation troops blew up the battery.

The nickname 'die schräge Batterie' (the slanted battery) arose because the first gun bunker and the command post were rotated about 35 degrees relative to the other bunkers. This offset is still visible on the ground. The site is now part of a holiday apartment complex, and the former military buildings serve as accommodation.

Access to the site follows preserved pathways that cross the grounds, allowing visitors to view the bunkers from the exterior. Pay attention to marked routes while exploring and follow any guidance provided at the location.

The munition bunker was disguised as a farmhouse to avoid detection during air raids, while a U-shaped barracks provided soldier accommodations. This hidden design reveals the precautions taken to protect the facility.